1. Context
• Client: 724events, an events agency looking to publish the new version of its one‑page marketing website.
• Team: Artdantech (freelance front‑end), Jean‑Baptiste (Marketing Director).
• Deliverables: fixed and stable website, green test suite, completed QA checklist/test plan, presentation outline and slides.
• Starting point: existing repo with partial integration, an “Issues” note from the previous developer, and a test plan to finish.
2. Need
• Finalize integration, fix blocking/UX bugs, secure component behavior, and stabilize the build.
• Improve tooling: run and interpret tests, use React DevTools, document via the QA checklist/test plan.
• Ensure a fast release without regressions with sufficient test coverage.
3. Client / Users
• Visitors: 724events prospects and partners, multi‑device browsing (mobile-first).
• Stakeholder: Jean‑Baptiste (Marketing), needs a smooth site, error‑free, ready to promote.
4. Goals
4.1 Functional
• Smooth one‑page navigation (anchors, header, sections), working interactive components (Slider, Forms, FAQ/Accordions, etc.).
• Responsive layout and baseline accessibility (keyboard navigation, contrast, labels).
• Green application tests and a QA checklist/test plan covering critical scenarios.
4.2 Technical
• Local run via yarn start, tests via yarn test --watch, zero build/lint errors.
• Fix state/props, context/data, effects (useEffect) and event handling.
• Update/add Jest + React Testing Library tests (unit and integration).
5. Constraints / Challenges
• Legacy code with partial integration, technical debt, and undocumented behavior.
• Short deadline: prioritize high-impact bugs (crashes, blockers, key journeys).
• Prevent regressions: align tests ↔ QA checklist ↔ requirements.
6. Process / Methodology
6.1 Analysis
• Review the “Issues” tab, read the QA checklist/test plan, map problematic components.
• Quick audit with DevTools (console, network, performance) and React DevTools (state/props/context).
• Inventory failing tests and correlate them with observed bugs.
6.2 Breakdown into GitHub issues
• Environment: Node/Yarn/commands, fix scripts if needed, lint/format.
• UI debugging: Slider (index, looping, rendering), anchor navigation/smooth-scroll, forms (validation/submission), responsive fixes.
• State management: validate Context/props drilling, sync state ↔ UI.
• Tests: fix existing tests, add unit tests (components/helpers) and integration tests (Home/critical sections).
• Accessibility/UX: visible focus, aria-labels, roles, contrast, tab order.
• Documentation: complete the QA checklist/test plan, presentation outline.
6.3 Architecture & logic
• Structure: page/sections (Header, Hero, Services, References, Testimonials, Contact), UI components (Button, Slider, Modal, Accordion).
• Fix strategy:
- Reproduce each bug, write/enable a minimal failing test (red), fix until green.
- Scope effects (useEffect) with correct dependencies, avoid infinite setState loops.
- Normalize props (types/defaults) and avoid mutations.
• Testing:
- Unit: conditional rendering, callbacks, formatting helpers.
- Integration: user journeys (navigation, slider, contact submission, anchors).
6.4 Technical choices (rationale)
• React DevTools to understand real-time state changes in the Slider/dynamic sections.
• Jest + React Testing Library: user-focused tests, less coupled to implementation details.
• Lightweight BDD (Given/When/Then) in the QA checklist to align business ↔ engineering.
6.5 Main flows
• Visitor: lands → browses sections via nav → interacts (slider, CTA) → contact form.
• Internal admin: checks mobile/desktop responsiveness, correct anchors, no console errors.
• QA: runs the test suite, compares results with the QA checklist, validates the release.
6.6 Tests & quality
• Targets:
- Slider: slide changes, loop edges, index display, focus/keyboard.
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Navigation: anchor links, active highlight, back-to-top.
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Form: validation (required/format), states (loading/success/error).
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Responsive: mobile/tablet/desktop breakpoints.
• Criteria: 0 failed tests, 0 console errors, smooth core UX, baseline accessibility OK.
7. Analysis
• Instability mostly came from approximate state handling (Slider indices, effect dependencies) and incomplete validations (form).
• Testing before/after each fix (red → green) secured behavior and prevented regressions.
8. Technical decisions
• Tools: React DevTools, Chrome DevTools, Jest, React Testing Library, ESLint/Prettier.
• Practices: clear component boundaries, immutable props, well-scoped hooks, usage-oriented tests.
9. Resolution logic
• Set up env → audit issues/tests → reproduce + red test → fix → green test → a11y/responsive review → complete QA checklist → prep presentation.
10. Stack used
• Tech: React 18+, Hooks/Context, Yarn, Node ≥ 16.14.2.
• Testing: Jest, React Testing Library, jest-dom, user-event.
• Quality: ESLint, Prettier, Husky (optional pre-commit).
11. Final outcome
• Stable 724events one‑page site with no blocking bugs, smooth navigation and responsive layout.
• Green test suite (unit + integration) covering critical journeys.
• Complete QA checklist/test plan and presentation outline ready, making production release and demonstration easier.